Hi, I discovred something never to do again today. Thought I might start a list..it will be sure to grow.
#1... never set a grading criteria for grade to distance with a grade of zero. Evidently C3D doesn't like that zero and a fatality always results. If you change the grade to a small number it is almost as effective as a flat grade for grading a shelf in a grading profile.
Please fell free to ad to the list .
John C 3d